Starting from 1.6 miles away, a car drives toward a speed checkpoint and then passes it. the car travels at a constant rate of 53 miles per hour. the distance of the car from the checkpoint is given by d = |1.6 – 53t|. at what times is the car 0.5 miles from the checkpoint? calculate your answer in seconds.

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.